WIP...

Add the following to the boot method of AppServiceProvider:

use Illuminate\Database\Eloquent\Relations\Relation;

Relation::requireMorphMap();

Relation::morphMap([
  //
]);

Consider adding the following to the boot method of AppServiceProvider:

static::preventLazyLoading($shouldBeStrict);
static::preventSilentlyDiscardingAttributes($shouldBeStrict);
// static::preventAccessingMissingAttributes($shouldBeStrict);

More details

Aaron Francis argues that you should turn on preventSilentlyDiscardingAttributes and preventAccessingMissingAttributes in production but only enable preventLazyLoading locally since lazy loading something in production isn't the end of the world.

Add this to the TestCase's setUp method:

Http::preventStrayRequests();

Docs

Info

Removed in Laravel 11.9

composer require --dev spatie/laravel-ignition